This object determines which capabilities will be advertised
during auto negotiation. Each capability is represented by
one bit. Set bit to 1 to advertise capability, 0 to deny it.
Capability Bit
---------------------- ---
reserved 0
Flow Control 1
1000 Mbps Full Duplex 2
1000 Mbps Half Duplex 3
100 Mbps Full Duplex 4
100 Mbps Half Duplex 5
10 Mbps Full Duplex 6
10 Mbps Half Duplex 7
OCTET STRING bitmasks count the leftmost bit (MSB) as 0.